In ICH GCP which of the following are stated as points that the sponsor should consider regarding Auditing Procedures?
1) The sponsor should ensure that the auditing of clinical trials/systems is conducted in accordance with the sponsor's written procedures on what to audit, how to audit, the frequency of audits, and the form and content of audit reports.
2) The sponsor's audit plan and procedures for a trial audit should be guided by the importance of the trial to submissions to regulatory authorities, the number of subjects in the trial, the type and complexity of the trial, the level of risks to the trial subjects, and any identified problem(s).
3) The observations and findings of the auditor(s) should be documented.
4) When required by applicable law or regulation, the sponsor should provide an audit certificate.
Which of the following is correct?